Year including construction (constant 2015 US$) 1994 53005.297372211986 1995 55212.553776044304 1996 57587.16540148501 1997 57257.58911128794 1998 57761.32994479059 1999 58452.4590953447 2000 60962.265401571596 2001 60242.63748903468 2002 61260.37128433085 2003 62787.49171101176 2004 66393.59250031353 2005 69301.26419547434 2006 70873.6226742729 2007 72633.25828859636 2008 73545.07639747711 2009 66178.05534624564 2010 75700.62980212244 2011 73653.04592210855 2012 74613.66777724211 2013 75563.03741195005 2014 77050.38083633622 2015 79362.84477908982 2016 80089.78643482825 2017 82544.00620575943 2018 83960.23522404257 2019 82285.61363641074 2020 79858.31962076372 2021 86509.68427896587 2022 85515.5841514091